As for shorthand notations, there are a few useful resources:
◼
  • Shorthand Notations (Wolfram How-To)
    • ◼
  • Syntax Guide
    • ◼
  • What are the most common pitfalls awaiting new users? (MMASE)
    • ◼
  • What the @#%^&*?! do all those funny signs mean? (MMASE)